This player has now achieved a strong level of intermediate play acquired usually through several seasons of dedicated play. Returning competitive players are encouraged to return to this level of instruction for a review of the fundamentals, strategies, and stroke forms necessary for competitive play. Knowledge of court positioning as well as full development of net and stroke is a prerequisite to this level. Advanced lessons on spin, strategy, and correction of form are an example of a level 4 lesson of the advanced subjects covered.